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Knowledge of safety and Civilization: what kinds of safety protection device should be have?
What kinds of safety protection device should be have?
Answer: 1, safety stop device; 2, mouth floor protective door; 3, a safety door entrance door; 4, shed; 5, limit; 6, emergency power-off switch, 7, signal device.
Answer: 1, safety stop device; 2, mouth floor protective door; 3, a safety door entrance door; 4, shed; 5, limit; 6, emergency power-off switch, 7, signal device.
